Use the Mockito JUNIT JUPITER framework for unit test

Use the Mockito JUNIT JUPITER framework for unit test Introduction: Mockito is a popular Java framework for writing reliable and maintainable unit tests.Junit Jupiter is Java's next -generation unit test framework, which is compatible with Mockito and provides more functions and flexibility.The combination of Mockito Junit Jupiter can help developers write high -quality, tested code. Features of Mockito Junit Jupiter framework: 1. Simple and easy to use: Mockito provides a simple and clear API, making it easy to write and configure the Mock object. 2. Flexibility: Mockito allows you to simulate and verify different types of objects, including interfaces, abstract classes and specific classes. 3. Test code that is easy to read and maintain: Mockito's grammar is very intuitive, making the test code easy to understand and maintain. 4. Support BDD-style test: Mockito Junit Jupiter framework supports the use of GIVEN-WHEN-THEN test method naming to write higher readable test code. 5. Seamless integration with Junit Jupiter: Mockito and Junit Jupiter can be tightly integrated. You can use other functions provided by Junit Jupiter, such as parameterized testing and test expansion. The following is an example code for unit testing using Mockito Junit Jupiter framework: import org.junit.jupiter.api.Test; import org.mockito.Mock; import org.mockito.InjectMocks; import org.mockito.junit.jupiter.MockitoExtension; import static org.mockito.Mockito.when; @ExtendWith(MockitoExtension.class) public class MyServiceTest { @Mock private MyRepository myRepository; @InjectMocks private MyService myService; @Test public void testFindById() { // Set the behavior of the Mock object when(myRepository.findById(1)).thenReturn(new MyEntity(1, "John Doe")); // Call the test method MyEntity result = myService.findById(1); // Validation results assertEquals(1, result.getId()); assertEquals("John Doe", result.getName()); } @Test public void testSave() { // Call the test method MyEntity entity = new MyEntity(1, "John Doe"); myService.save(entity); // Verify whether the method of the MOCK object is called verify(myRepository).save(entity); } } In the above example, we used the@mock` annotation to create a Mock object, and use the@injectmocks` annotation to inject the Mock object into the tested class.Then, we use the `when` method to set the behavior of the Mock object to return the expected results when calling the correlation method.Finally, we use an assertion to verify the test results and use the `Verify` method to verify whether the Mock object method is correctly called. By combining Mockito and Junit Jupiter, we can write simple and powerful unit tests to ensure the quality and reliability of the code.At the same time, the Mockito Junit Jupiter framework also provides many other functions, such as parameterized testing and test extensions, which can further enhance our testing capabilities.